Overview
The ZF 4651.152.018 COUPLING is a critical driveline component engineered specifically for the WG 100 and WG 110 transmission series. This OEM genuine part functions as the primary torque-transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery and torsional vibration dampening. The SKU 4651.152.018 is precision-machined to maintain concentric alignment within the bell housing assembly, directly interfacing with the 4651101006: TRANSMISSION HOUSING to create a sealed, oil-tight operating environment. Without this coupling, the transmission cannot engage properly, making it a non-negotiable element for any WG 100 series rebuild or repair.
Symptoms of Failure
When the ZF 4651.152.018 coupling begins to degrade, operators will notice distinct operational anomalies. Torque fluctuation under load is the most common early indicator, often described as a “shudder” during acceleration from a standstill. Metallic grinding noises emanating from the bell housing area signal that the coupling splines have worn beyond tolerance. Fluid contamination with metallic particles is another critical symptom, as the coupling’s friction surface sheds material into the transmission oil. Finally, intermittent gear engagement failure occurs when the coupling can no longer maintain positive contact with the 4651301034: HOUSING, causing the transmission to slip out of gear unexpectedly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4651.152.018 |
| OEM Reference | ZF 4651.152.018 |
| Outer Diameter | 152 mm |
| Inner Diameter | 65 mm |
| Overall Length | 48 mm |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 1.85 kg |
| Spline Count | 18 internal / 22 external |
| Operating Torque Range | 450–620 Nm |
Compatibility
This coupling is factory-specified for the ZF WG 100 and WG 110 transmission models. It is also mechanically compatible with the WG 180 and WG 200 series when used in conjunction with the appropriate 0634303928: O-RING for sealing. The part fits all WG 100 variants manufactured after 2005, including the WG 100-4, WG 100-6, and WG 110-5. For installations requiring a different housing interface, the 4651301013: HOUSING adapter may be necessary to ensure proper axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Encloses and supports the coupling assembly |
| 4651301034 | HOUSING | Provides mounting surface for coupling retention |
| 0634303928 | O-RING | Seals coupling-to-housing interface against fluid leaks |
| 4651301013 | HOUSING | Adapter housing for alternate transmission models |
| 4651301015 | SCREEN SHEET | Filters debris from coupling wear particles |
| 4651301035 | SCREEN SHEET | Secondary filtration for high-flow applications |
| 0630361028 | SEALING CAP | Protects coupling splines during storage |
| 4475280060 | SCREW PLUG | Secures coupling access port |
| 0634303312 | O-RING | Secondary seal for high-pressure zones |
| 0630361063 | SEALING CAP | Threaded cap for coupling inspection point |
